2024 GMC Sierra

Truck Flex Fuel
GMC Sierra 2024
25MPG Combined
15 Trims
← 2023 2024 2025 →
Updated February 27, 2026

The 2024 GMC Sierra is a Truck that delivers 16–25 combined MPG depending on trim. Here’s everything you need to know about this vehicle, from fuel economy to safety ratings.

2024 GMC Sierra Specifications

SpecValue
Combined MPG16–25 combined MPG depending on trim
City MPG23
Highway MPG29
Body StyleTruck
Fuel TypeFlex Fuel
DriveRWD
Available Trims15

Available Trims

TrimMPG (City/Hwy/Combined)EngineTransmission
Auto16/20/185.3L 8cylAutomatic 10-spd
Auto15/19/165.3L 8cylAutomatic 10-spd
Sport16/20/185.3L 8cylAutomatic 10-spd
Auto16/21/185.3L 8cylAutomatic 10-spd
Auto23/29/253.0L 6cylAutomatic 10-spd
Auto18/22/202.7L 4cylAutomatic 8-spd
Sport17/21/192.7L 4cylAutomatic 8-spd
Auto15/19/175.3L 8cylAutomatic 10-spd
Auto15/19/166.2L 8cylAutomatic 10-spd
Auto15/19/165.3L 8cylAutomatic 10-spd
Sport15/19/175.3L 8cylAutomatic 10-spd
Auto15/20/175.3L 8cylAutomatic 10-spd
Auto23/27/243.0L 6cylAutomatic 10-spd
Sport17/18/172.7L 4cylAutomatic 8-spd
Auto17/20/182.7L 4cylAutomatic 8-spd

Annual Fuel Cost

Based on EPA estimates, the 2024 GMC Sierra costs approximately $2,556 per year in fuel. This assumes 15,000 miles driven annually and current fuel prices.

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